Sr immobilization in irradiated Portland cement paste exposed to carbonation
| Autor: | Laure Chomat, Stéphane Poyet, Michal Arbel-Haddad, Nathalie Macé, Ofra Klein-BenDavid, Gabriela Bar-Nes |
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| Přispěvatelé: | Nuclear Research Center-Negev (NRCN), Ben-Gurion University of the Negev (BGU), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Collaboration CEA-IAEC |
| Rok vydání: | 2018 |
| Předmět: |
carbonation
Materials science Carbonation 0211 other engineering and technologies 02 engineering and technology Thermal treatment Electron microprobe [SPI.MAT]Engineering Sciences [physics]/Materials law.invention law 021105 building & construction characterization General Materials Science Irradiation Cement Inert Building and Construction 021001 nanoscience & nanotechnology cement paste leaching [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering Portland cement radioactive waste Leaching (metallurgy) 0210 nano-technology [SPI.GCIV.GCN]Engineering Sciences [physics]/Civil Engineering/Génie civil nucléaire Nuclear chemistry |
| Zdroj: | Cement and Concrete Research Cement and Concrete Research, 2018, 107, pp.152-162. ⟨10.1016/j.cemconres.2018.02.015⟩ Cement and Concrete Research, Elsevier, 2018, 107, pp.152-162. ⟨10.1016/j.cemconres.2018.02.015⟩ |
| ISSN: | 0008-8846 |
| DOI: | 10.1016/j.cemconres.2018.02.015 |
| Popis: | International audience; Cement based materials are widely used as binding matrices for radionuclides in low and intermediate level waste management applications. We studied the effect of irradiation and carbonation under atmospheric condition on the leaching of Sr from Portland cement paste. Samples were exposed to gamma irradiation or subjected to thermal treatment under either inert or atmospheric conditions. Leaching tests were performed and supplemented by post-leaching characterization including local chemical analysis (LA-ICPMS) crystallographic analysis (XRD), and EPMA imaging. The combination of these methods enabled us to link between the crystallography, texture and composition of the treated samples and their ability to retain Sr ions. Results show that carbonation was the main factor determining the retention of Sr ions, whereas irradiation did not have a significant effect. Moreover, carbonation has a positive effect on the retention of Sr ions in the matrix with the formation of a carbonated zone. |
| Databáze: | OpenAIRE |
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